CN101777342A - Electric keyboard instrument - Google Patents

Abstract

An electric keyboard instrument efficiently transfers vibration generated by key push detection onto the fingers of the player, and simultaneously transfers onto the pedal, and also transfers the vibration to the feet of the player. The stage plank converters are fixed on one side of the player relative to the support base, in response to the push operations of every keys on the keyboard, the stage plank vibrates based on the tone signal output by the sound source part. The stage plank converters are provided on the area corresponding to a reed, passes through the positions of the balance holes become key pivots, and the white keys and the black keys can vibrate. At a position that the white keys and the black keys are pressed to the end, the lower surface of one side of the key front end part of the white keys and the black keys is abutted to a front reed, and the vibration is transferred to the white keys and the black keys by the front reed. The stage plank converters are provided only on the low diapason side from the central of the keyboard fixed.

Description

Electric keyboard instrument

Technical field

The present invention relates to electric keyboard instrument, particularly relate to and a kind ofly make when sending musical sound the structure member vibration vibration is passed to the technology of player's health.

Background technology

Primary sound piano (acoustic piano) as natural musical instrument is the pronunciation mechanism that musical instrument itself has vibrating mass.Thereby, except the musical sound that ear is heard, be directly delivered to the vibration pleasant of body parts such as player's finger and pin, also the truly feels that can make the player obtain to play.

But electric keyboard instrument is the musical instrument that note signal that loudspeaker is generated based on the electronics source of sound is sounded.Therefore, so the truly feels of lack playing are at the natural musical instrument that pours into too late primary sound aspect the easy degree of emotion.

Therefore, existing in the past people has proposed following technology: produce the vibration sense when playing the primary sound piano on electric keyboard instrument.

Following electric keyboard instrument is by known to the people: driver (mechanical vibrator generator) is installed in the two ends, the left and right sides of thin metal oscillating plate of the whole below of overlay keyboard, will outputs to this driver from the output note signal of source of sound output.Also have, following example is by known to the people: keyboard integral body is divided into four zones, respectively each area configurations is equipped with the oscillating plate of driver, each oscillating plate is installed in the lower surface of the vibration frame of the whole below that is disposed at keyboard in opposite directions, and note signal is outputed to driver by the wave filter corresponding to each range; Bottom about keyboard disposes oscillating plate, and drives each oscillating plate (referring to patent documentation 1) by stereophonic signal.

In these prior arts, the lower surface of the key that is pressed and oscillating plate or vibration frame butt will vibrate via this key thus and pass to finger tip.

In these prior arts, the position of not shown key fulcrum.But the key position of the fulcrum of keyboard at that time is positioned at because of blocked the position of invisible inboard by keyboard.Therefore, although make oscillating plate or vibration frame vibration after being pressed just detecting key, but owing to can be attenuated via the vibration that the body of key is delivered to finger tip, can not be delivered to finger tip so can be speculated as just detecting the key after vibration that is pressed from the key fulcrum yet.

Yet in the primary sound piano, under the situation that slams system sound pedal, or under the situation of firmly carrying out key pressure signature operation, hammer is upspring key chattering before key and locating part (stopper) collision.But, in above-mentioned prior art, can't reproduce the vibration before of key and lower limit locating part butt truly.

On the other hand, following technology is also by known to the people: each key of keyboard be installed on by the key fulcrum that framework (frame) is gone up and the electric keyboard instrument of this framework mounting on frame plate in, 3 mechanical vibrator generators are installed in the lower surface of framework, and this mechanical vibrator generator vibrates (referring to patent documentation 2) when bond switching comes work by the key pressing operation.

If mechanical vibrator generator vibration, parts or the air vibration by combining with framework then makes the body vibration of key board unit.In addition, if key is further pushed downwards, then because of tab and framework butt, so also be delivered to player's finger via the vibration of tab.

But above-mentioned mechanical vibrator generator is configured in the place ahead of the fulcrum of key, and to be delivered to player's the distance of finger elongated so vibration is from the body via key lighted of key, the therefore vibration decay easily that becomes.Moreover, because of between key framework and frame plate, being provided with shock-resistant member, so vibration can not be delivered on the frame plate.

In addition, former following grand piano type electric keyboard instrument is by known to the people: dispose loudspeaker on the plate being fixedly set in laying on the framework, and on castanets equipped with switches (transducer) (referenced patent file 3).

Castanets are fixed across rubber panel parts and remain on the framework, make the vibration of castanets can not be delivered to the pin body.

When system sound pedal is in opening, the Wave data of damper sound is supplied to these converters, by castanets generation damper sound.But, the not special vibration of considering to pass to player's trick from keyboard.

The prior art document

Patent documentation 1: No. 2808617 communiques of Japan's special permission

Patent documentation 2: TOHKEMY 2008-46370 communique

Patent documentation 3: TOHKEMY 2007-47273 communique

Summary of the invention

The present invention proposes in order to address the above problem, its purpose is to provide a kind of electric keyboard instrument, this electric keyboard instrument makes the vibration that takes place by the key pressing detection be delivered to player's finger at once expeditiously, make this vibration transfer to pedal simultaneously, and vibration also is delivered on player's the pin.

Electric keyboard instrument of the present invention has: frame plate, be used to set keyboard, and a plurality of keys of described keyboard are operated by the fulcrum of described each key; Pedal is operated by the player; The pedal pillar is used to support described pedal; Sound source part is exported note signal in response to the pressing operation of described each key, and controls described note signal by the operation of described pedal; A plurality of frame plate converters vibrate based on the note signal from described sound source part output; Wherein, described fulcrum is made of the key support component; Described key support component is arranged on the upper surface of described frame plate along the key orientation; Described a plurality of frame plate is with the ad-hoc location on one in the converter lower surface that is arranged on described frame plate, this ad-hoc location is meant, being the corresponding region of key support component, is again the position at the center section between central and described keyboard basso one end at described keyboard in the described key orientation; Described a plurality of frame plate is arranged on the ad-hoc location on the lower surface of described frame plate with in the converter another, this ad-hoc location is meant, being the corresponding region of key support component, is again the position of the center section between the central authorities of described set position in frame plate usefulness converter and described keyboard in the described key orientation; Described pedal pillar is arranged at the central authorities of the described keyboard in the described key orientation in lower surface one side of described frame plate.

Therefore, if a plurality of frame plates begin vibration with converter, then vibration just is delivered to the key support component of upper surface from the lower surface of frame plate, so if by the key pressing detection, make source of sound output note signal, vibration just is delivered to player's finger at once so, and because vibration transfer path is short, so vibration is difficult for decay, can transmit expeditiously.

Because the pedal pillar is configured on the frame plate of keyboard centre, thus can make pedal with the high efficiency vibration of keyboard, thus also can feel vibration on the pin.

Usually, the musical sound of bass feels that easily it vibrates, and therefore in the primary sound piano of natural musical instrument, is feeling vibration easily from basso one side of keyboard central authorities.For this reason, the same by adopting of the configuration of above-mentioned frame plate with the vibration of on the primary sound piano, being felt with converter, can feel vibration from basso one side of keyboard central authorities.

And, in the primary sound piano, be difficult to feel in the caused vibration of musical sound that takes place from its high line one side of keyboard central authorities, even if therefore the frame plate converter is not set in high line one side, also influence effect and can reducing cost not.

And then, with regard to the setting of key length direction, also can frame plate be arranged on the corresponding region between the leading section of key support component and each key with converter at the lower surface of frame plate.

If adopt such configuration, then on the position that key is pressed into the end when bottom surface of leading section one side of key and frame plate one side butt, also can feel vibration by abutting part.

Compare with the structure of the position that is centered close to the key support component of converter with making frame plate, even said structure also can be felt vibration easily in the position that is pressed into the end, so it is very natural to be delivered to the vibration of keyboard.

Electric keyboard instrument of the present invention, has the automatic playing unit, described automatic playing unit is the コ font when depression angle is seen, and being provided in lower surface one side of described frame plate, it is in the described recess of コ font that frame plate is arranged on when depression angle is seen with described one at least a portion in the converter.

Therefore, even if the configuration of automatic playing unit and frame plate partially overlap each other with the desired configuration of converter, also can dispose.The automatic playing unit can be arranged on the inside of the operating surface board of drawer type.In the structure of drawer type, be necessary only to make the edge of its both sides on the depth direction of basket, to extend, be the コ font so can form when the vertical view angle is seen.

According to the present invention, has following effect: can make the vibration that takes place by the key pressing detection be delivered to player's finger at once expeditiously, and this vibration not only can be delivered to outside the keyboard, can also pass on the player's who contacts with pedal the pin.

Particularly, can produce in the electric keyboard instrument of abundant musical sound, can obtain the rich more performance sense of reality and pour into the electric keyboard instrument of emotion easily by the present invention being applied to because of having big loudspeaker horn and pedal.

Description of drawings

Fig. 1 (a) and Fig. 1 (b) are the right view of an embodiment of the invention that shows the application.

Fig. 2 is the upward view of the embodiment shown in Fig. 1 (a) and Fig. 1 (b).

Fig. 3 (a) and Fig. 3 (b) are the vertical view of the embodiment shown in Fig. 1 (a) and Fig. 1 (b), also show the inner structure of loudspeaker box.

Fig. 4 (a) and Fig. 4 (b) send the general block diagram of the function of musical sound for being used for explanation in the key pressing operation in the embodiment loudspeaker response shown in Fig. 1 (a) and Fig. 1 (b).

Embodiment

Fig. 1 (a), Fig. 1 (b) are the right view of an embodiment of the invention that shows the application.

In Fig. 1 (a), about inner structure, with dashed lines only shows the part that substantial connection is arranged with the application's invention.Fig. 1 (b) is keyboard and the peripheral enlarged drawing thereof among Fig. 1 (a), and inner structure is also illustrated with solid line.

Among the figure, the bottom of basket is made of frame plate (noseplate) 1 and back base plate 2, and frame plate 1 is for being used for the keyboard base plate of mounting keyboard.Be arranged with a plurality of white key 31, black key 32 that the player operates in order to play on keyboard, the preferred number of key is 88 in grand piano.

The side of basket is made of the mouth rod 4 that is used to form leading flank (header board), the rib side plate 5 and the side plate 6 that are used to form horizontal side, the backplate 28 that is used to form the back side.The front lower of keyboard (Bai Jian 31, black key 32) is surrounded by mouth rod 4, and the side about keyboard is surrounded by rib side plate 5.The front upper of basket by last header board 7, the day before yesterday plate 8 and the day after tomorrow plate 9 cover.

Make plate thickness of slab attenuation of 8 day before yesterday etc. so that its easy vibration, the day before yesterday, plate 8 had the function of castanets thus.

Utilize protecgulum 10 and cover greatly 11 open and close by the day before yesterday plate 8 and the day after tomorrow basket that plate 9 constitutes sky plate face.

Three socles 12 are positioned at the two ends, the left and right sides and the back central authorities of front, and the bottom has Caster 13.At the lower surface of frame plate 1, the orientation of the key on the keyboard is fixed with bar-shaped base for supporting 14, is fixed with mounting seat 15 at the central portion of its length direction.The pedal pillar 16 of pair of right and left is installed in the keyboard central portion of this mounting seat 15.Pedal case 17 is arranged on the foot of pedal pillar 16, and the rotational support portion of three pedals 18 is arranged at this.Three pedals 18 are being connected with bar 19 respectively.

The player is as long as one depress pedal 18, and bar 19 just rises, and is the reciprocal rotation of driving shaft with this motion converter in crankcase (crank box) 20, thereby the rotational potentiometers (potentiometer) in the mechanical electric change-box 21 are rotated.In addition, this rotational potentiometer also can be arranged on the pedal case 17.

With regard to the player, in three pedals 18, right-side pedal for system sound pedal (Damper Pedal), central pedal for hold sound pedal (Sostenuto Pedal), left pedal is the sound pedal (Soft Pedal) that softens.Separate with floor the bottom of pedal case 17.Pedal unit is made of above-mentioned mounting seat 15, pedal pillar 16, pedal case 17, pedal 18, bar 19, crankcase 20, mechanical electric change-box 21.

Two-layer loudspeaker enclosure (also being referred to as audio amplifier (enclosure)) is formed on the top of back base plate 2.As narrating with reference to Fig. 3 (a) and Fig. 3 (b) later on, loudspeaker enclosure is made of bottom loudspeaker enclosure 22 and top loudspeaker enclosure 23, and is divided into four casings respectively.

Back base plate 2 is the base plate of bottom loudspeaker enclosure 22, also is the baffle plate of bottom loudspeaker enclosure 22 simultaneously.22a is the upper plate of bottom loudspeaker enclosure 22, is again the base plate of top loudspeaker enclosure 23.22b is the outer panel on every side that surrounds bottom loudspeaker 22.

23a is the upper plate of top loudspeaker enclosure 23, is again the baffle plate of top loudspeaker enclosure 23.23b is the outer panel that surrounds the periphery of top loudspeaker enclosure 23.

Shown in Fig. 1 (b), on the lower surface of frame plate 1, frame plate is fixed on the position that relative base for supporting 14 is positioned at player's one side (side of mouthful rod 4) with converter (LKB2) 24, frame plate with converter (LKB1) 25 (with reference to Fig. 2).As narrating with reference to Fig. 4 (a) and Fig. 4 (b) later on, in response to the key pressing operation to each key on the keyboard, the note signal of exporting based on sound source part makes frame plate 1 vibration to these frame plates, also can be referred to as to encourage the device that shakes with converters.

On the lower surface of frame plate 1, guidance panel resettlement section 26 is fixed on the left field of basket.Operating surface board (automatic playing unit) 27 is contained in this guidance panel resettlement section 26.

Operating surface board (automatic playing unit) 27 is a drawer-type structure, utilizes its handle 27a that it is retracted to player's one side during use below mouth rod 4.Under the state that is not drawn out of, the player can't see operating surface board 27, so present the outward appearance just as the primary sound piano.

The frame plate of one of them is provided in the part that the configuration with guidance panel resettlement section 26, operating surface board (automatic playing unit) 27 coincides with converter 25.

Therefore, overlook when observing, guidance panel resettlement section 26, operating surface board (automatic playing unit) 27 form the コ font, are formed with recess square thereafter, and frame plate is provided in this recess with at least a portion of converter 25.

Then, the keyboard of mounting in the upper surface of frame plate 1 is illustrated.

31 is white key, and 32 is black key.Reed 33 is fixed on the substantial middle portion of these key length directions.

Reed 33 is parts identical with the primary sound piano, is arranged in the orientation of the key on the keyboard, is a kind of key support component that is used to support the fulcrum of white key 31, black key 32.

On the surface, on the key length direction, bend to convex thereon, with each key in a plurality of keys each outstanding balance bolt 34,35 accordingly.Balance bolt 34 is that white key 31 is used, and balance bolt 35 is that black key 32 is used.

On white key 31, black key 32, be formed with equalizing port 31a, 32a, be balanced bolt 34,35 and embed.The bottom of equalizing port 31a, 32b becomes the rotating fulcrum portion of key.Therefore, on frame plate 1, be equipped with the whole white key 31 that is used to constitute keyboard, the key fulcrum of black key 32 via reed (key support component) 33.

In addition, illustrated reed 33 is club shaped structures that extend in the key orientation.But also can be divided into many (for example, cutting apart), and divided a plurality of reed is set up in parallel along the key orientation by each key, each key range.In addition, also the reed that reed and the black key of Bai Jianyong are used can be formed independently reed, and both are staggered on the key length direction be set up in parallel.

On the upper surface of frame plate 1, bar-shaped preceding reed 36 be fixed on Bai Jian 31, black key 32 leading section 31b, 32b near, it is arranged in the key orientation on the keyboard with reed 33.Be provided with not shown pilot pin in that the upper surface of this preceding reed 36 is outstanding, this pilot pin is used to limit dialogue key 31, black key 32 and carries out the position of key when arranging, and this pilot pin is inserted into the inside of each key below white key 31, black key 32.

Key is being pressed under the state at the end, the lower surface of the leading section 31b of Bai Jian 31, black key 32,32b one side and preceding reed 36 butts, the lower position that key is pushed in the stroke (stroke) is limited.

On the upper surface of frame plate 1, the key pressing detection sensors 38 of Bai Jianyong, the key pressing detection sensors 39 that black key is used are provided between leading section 31b, the 32b and key fulcrum (position of equalizing port 31a, 32b) of Bai Jian 31, black key 32.Key pressing detection sensors 38,39 for example is the sensor of non-contact type optical fiber formula, have illuminating part and light accepting part, change according to catoptrical light quantity, detect key pressing operation, key releasing operation, key and push speed and key according to pressing depth (path increment) from key.

Replace this form, key pressing detection sensors 38,39 also can adopt the known bond switching with contact electrical contact of being pushed by key.

On the other hand, the piano performance mechanism (not shown) with hammer is connected on the upper surface of rearward end one side of key fulcrum of Bai Jian 31, black key 32.The back detecting device 37 outstanding from the rearward end of white key 31 also is the part of piano performance mechanism.Also be provided with the sensor that is used to detect the hammer action.

In a side of the lower surface of the frame plate 1 of rearward end one side of the key fulcrum of white key 31, black key 32, via base for supporting 14 and mounting seat 15 and about be separately installed with a pedal pillar 16 that had illustrated.

Frame plate is arranged at the key support component corresponding region corresponding with described reed 33 of the lower surface of frame plate 1 with converter 24,25, in other words, be arranged at the level angle zone that at least a portion overlaps with reed 33 when observing on the key length direction.

If adopting so, frame plate then when carrying out the keyboard performance, also makes Bai Jian 31, black key 32 vibrations from frame plate 1 via reed 33, key fulcrum with the configuration of converter 24,25.

Its result, with transfer of vibration path in the primary sound piano similarly, vibration is transmitted below the reed 33 of frame plate 1, and the length of bang path is also short, so can realize being rich in the sense of reality and the high vibrational structure of efficient.

More particularly, when frame plate is disposed on the key length direction with converter 24,25, be arranged on such zone, this zone is meant, when observing, its at least a portion level angle overlaps with the position of reed 33, and corresponding to the zone between the leading section 32b of the leading section 31b of reed 33 and Bai Jian 31, black key 32.In illustrated embodiment, be set to till the zone corresponding to preceding reed 36.

In the position that is pressed into the end of white key 31, black key 32, the key leading section 31b of Bai Jian 31, black key 32, the lower surface of 32b one side and preceding reed 36 butts, the past reed 36 is passed to Bai Jian 31, black key 32 so vibrate also.

Such just as already explained, when key is pressed into the end, preceding reed 36 and the leading section 31b of white key 31, near the butt of leading section 32b of black key 32.Therefore, the player further can feel vibration by key when key is pressed into the end.For this reason, if frame plate staggers from reed 33 forward end 31b, black key leading section 32b one side as the key fulcrum with the center of converter 24,25, then feel vibration easilier on the position at the end being pressed into.

Fig. 2 is the upward view of the embodiment shown in Fig. 1 (a) and Fig. 1 (b).

In the drawings, marked same Reference numeral for the part identical with Fig. 1 (a) and Fig. 1 (b).

Frame plate 1 be shaped as rectangle, back base plate 2 has curved shape shape, inboard projection that is similar to grand piano.The central authorities of the key orientation on the most inboard relative keyboard are positioned at and form bass one side slightly.

Then, frame plate is illustrated with the configuration of converter 24,25 in the key orientation of keyboard.

In the primary sound piano, vibrate the easy more transmission of bass, and high pitch is attenuated easily in the transmittance process of string → string framework → frame plate → these intermediates of key.Therefore, at the lower surface of frame plate 1, frame plate is arranged on bass one side from keyboard central authorities with 24,25 of converters.

Frame plate with converter (LKB1) 25 the pars intermedia between the basso end of central authorities that are arranged at the keyboard in the key orientation on the lower surface of frame plate 1 and keyboard (may not be and the basso end of keyboard between central authorities).Frame plate is provided with frame plate with the pars intermedia central authorities of converter (LKB1) 25 position and keyboard between in the key orientation with converter (LKB2) 24 being arranged on the lower surface of frame plate 1.

In illustrated embodiment, shown in Fig. 3 (a) and Fig. 3 (b), frame plate is configured in gamut to keyboard with converter (LKB1) 25 and carries out four high pitch one sides of low range when cutting apart, and frame plate be configured in converter (LKB2) 24 in the central part of low range.

In the key orientation, the central authorities of keyboard are central consistent with base for supporting 14 and mounting seat 15, and the pedal pillar 16 about pedal unit is configured in the position, the left and right sides near the central authorities of keyboard.In addition, look from key length direction (illustrated left and right directions), frame plate also is configured in the position of player's one side that is adjacent to base for supporting 14, mounting seat 15 with converter 24,25.

Therefore, frame plate is close with converter (LKB2) 24 and pedal pillar 16.Its result can make keyboard (Bai Jian 31, black key 32) vibration by frame plate with the vibration of the frame plate 1 of converter (LKB2) 24, and pedal 18 is vibrated expeditiously.

Utilization has been experienced the perception degree from the vibration of pedal 18 as the grand piano of natural musical instrument and the electric keyboard instrument of embodiments of the present invention.At this moment, can open and close the driving of frame plate with converter 24,25.

At grand piano, and opened on the electric keyboard instrument of frame plate with the driving (encouraging the pattern of shaking) of converter 24,25, the vibration of nature has been delivered on the pin from pedal 18.

Relative therewith, to close on the electric keyboard instrument of frame plate with the driving (the non-pattern of shaking of encouraging) of converter 24,25, vibration is not delivered on the pin from pedal 18, and sensation is nature not.

On grand piano as natural musical instrument, because of can not under the situation of the vibration that stops pedal, playing, thus can't compare in the past, however by above-mentioned comparison, understood that the vibration transfer of pedal 18 can make people's body and mind joyful to pin.

As everyone knows, in grand piano or portions of electronics keyboard instrument, superb playing technique is that half pedal (half pedal) is played.

So, if can control the note signal that sound source part generates by the performance of half pedal, then frame plate also can change along with the performance of half pedal with the vibration of converter 24,25 outputs, therefore the player can feel the effect of half pedal function by the vibration of pedal, and this helps half pedal to play.

The player's of the operating surface board (automatic playing unit) 27 that illustrated among Fig. 1 (a) and Fig. 1 (b), the lower surface that guidance panel resettlement section 26 is configured in frame plate 1 left hand one side.In this figure, show operating surface board (automatic playing unit) 27 and be drawn to the state of player's one side.

Rear about the bottom surface of operating surface board (automatic playing unit) 27 is extruded with supporting guide 27b, 27c, makes not come off from guidance panel resettlement section 26 when operating surface board (automatic playing unit) 27 is drawn to player's one side.Therewith accordingly, the rear on guidance panel resettlement section 26 also extends the support guide spare 26a, the 26b that are useful on supported guide rail 27b, 27c, and forming on half position of pact of inboard thus is the recess of コ font when depression angle is seen.

As the explanation that reference Fig. 1 (a) and Fig. 1 (b) are done, frame plate is fixed on above-mentionedly see it is in the recess for the コ font from depression angle with the major part of converter (LKB1) 25.

Be adjacent to be provided with panel 41 with the left-hand side of operating surface board (automatic playing unit) 27, this panel 41 has power switch 41a, two headphones (Head phone) terminal 41b, USB terminal 41c.

The terminal strip 44 of power lead exit daughter board 43, MIDI connector, external loudspeaker splicing ear etc. is set at back base plate 2.

Also illustrating in Fig. 1 (a) and Fig. 1 (b), the inboard along the side plate 4 of basket in the rear section of basket exists bottom loudspeaker enclosure 22 and top loudspeaker enclosure 23.

Back base plate 2 is provided with in a plurality of loudspeakers as the peristome of low range with four bass horns (LWo, CWo, RWo, BWo) of loudspeaker.

In player's one side of back base plate 2, left bass horn LWo, central bass horn CWo, right bass horn RWo are configured to straight line in the key orientation.The bass horn CWo of central authorities is positioned at the central authorities of the key orientation on the keyboard.Back bass horn BWo is configured in the inboard of back base plate 2.

In illustrated embodiment, make the flange (Flange) of loudspeaker unit coincide with each peristome, corresponding then these flanges embed rosette 42, wait with screw loudspeaker unit is installed.Each loudspeaker unit is designed to horn-like expansion till 42 the opening surface from the opening surface to the rosette.

Fig. 3 (a) and Fig. 3 (b) are the vertical view of the embodiment shown in Fig. 1 (a) and Fig. 1 (b).Therefore, wherein, has the place ahead part of keyboard and the music score platform figure for from top the observation time.And, also show the inner structure of loudspeaker enclosure.Omission illustrates protecgulum 10 and big lid 11.In the drawings, marked identical Reference numeral for the part identical with Fig. 2 with Fig. 1 (a) and Fig. 1 (b).

Inner structure as loudspeaker enclosure, the inner structure of the top loudspeaker enclosure 23 in the horizontal cross-section when the A-A direction of arrow in Fig. 1 (a) is observed has been shown in Fig. 3 (a), the inner structure of the bottom loudspeaker enclosure 22 in the horizontal cross-section when the B-B direction of arrow in Fig. 1 (a) is observed has been shown in Fig. 3 (b), and has shown the peristome of bass horn.

51 is keyboard, shows the white key 31 of Fig. 1 (a) and Fig. 1 (b) and the exposed portions serve of black key 32.Dot-and-dash line along the key orientation is the position of the leading section 32b of black key 32.

Operating surface board (automatic playing unit) 27 shows the state that is drawn to player's one side, and the surface is provided with a plurality of action button 27d thereon.

52 is the music score plate, and this music score plate is positioned at the central authorities of the key orientation on the plate 8 day before yesterday, with the day before yesterday plate player's one side of 8 as fulcrum the music score plate is erected and uses.53,54 is left and right sides music score platform (candlestick), and the part of the side plate 6 about they are installed on inboard also floats on the plate 8 day before yesterday, and leave be spaced apart and arranged in music score plate 52 about.

The darkest arcuation of depth that the day before yesterday, plate 8 formed in the centre of key orientation, this day before yesterday plate 8 with the day after tomorrow plate 9 combine.The day before yesterday, plate 8 was a wood-based planet, by making the thickness of slab attenuation vibration was transmitted easily, replaced the castanets of grand piano to use.

At plate 8 the lower surface day before yesterday, castanets with left-hand rotation parallel operation (LTr) 55, castanets with right-hand rotation parallel operation (RTr) 56 be fixed on above-mentioned music score plate 52 and about music score platform 53,54 between the correspondence position in gap.

Castanets are positioned at same position with frame plate with converter (LKB1) 25 with left-hand rotation parallel operation (LTr) 55 in the key orientation, and are positioned at the inboard of frame plate with converter (LKB1) 25 on the key length direction.

Being positioned at backplate 28 upper left hinges 57 is the metalworks that are used to install big lid 11, and this big lid 11 is omitted diagram.Jack-up rod 58 is to be used for the big lid of jack-up 11 right sides.

Be formed with on the plate 9 as high range with the peristome of the loudspeaker of loudspeaker and as the peristome of midrange (middle range) in the day after tomorrow with the mediant trumpet of loudspeaker.Each peristome in illustrated embodiment is provided with rosette 59, and the rosette of mediant trumpet and loudspeaker is integrally formed, becomes the shape of tumbler.

The mediant trumpet peristome of rosette 59 forms its aperture area of peristome from the middle pitch loudspeaker unit with horn-like expansion.

Loudspeaker unit comprises eight loudspeaker altogether: left loudspeaker (LTw), left mediant trumpet (LSc), central loudspeaker (CTw), central mediant trumpet (CSc), right loudspeaker (LTw), right mediant trumpet (LSc), back (rear) loudspeaker (BTw), back (rear) mediant trumpet (BSc).

The base plate of the top loudspeaker enclosure 23 shown in Fig. 3 (a) is also used as the upper plate 22a of bottom loudspeaker enclosure 22.Being used to surround peripheral outer panel 23b is the inequilateral sexangle, and the curved-surface structure that is prolonging the backplate 28 of basket is provided with.The left and right side of outer panel 23b with about side plate 6 parallel (parallel) with the key length direction, the side of player's one side of outer panel 23b, inboard side are parallel with the key orientation.

In cut apart plate 23c and be parallel to the key orientation, be used for top loudspeaker enclosure 23 is divided into player's one side and inboard two parts.In cut apart plate 23d, 23e and be parallel to the key length direction, be used for player's one side of top loudspeaker enclosure 23 is divided into three parts on left side, central authorities and right side.In the loudspeaker enclosure that is split into four parts altogether, dispose left mediant trumpet (LSc), central mediant trumpet (CSc), right mediant trumpet (LSc) and back (rear) mediant trumpet (BSc).

Central authorities' mediant trumpets (CSc) and central loudspeaker (CTw) together are configured in the central authorities of the keyboard 51 in the key orientation.Left side mediant trumpet (LSc) is configured in the position that is positioned at close slightly player's one side of relative central mediant trumpet (CSc) on the key length direction with right mediant trumpet (RSc).

Shown in Fig. 1 (a) and Fig. 1 (b), the baffle plate 23a of top loudspeaker enclosure 23 and the day after tomorrow plate 9 be the plate of non-one.To the overlapping contact plate that has perforate equally that is provided with of the perforate of this baffle plate 23a.And then overlapping thereon setting has the plate 9 day after tomorrow of perforate, and the flange of the above-mentioned mediant trumpet of mounting, and the boudle ring 59 then, are screwed again.

Till from the peristome of middle pitch loudspeaker unit to day after tomorrow plate 9 peristome, form the long-pending sound equipment path of open section with horn-like expansion by rosette 59.

On the other hand, left loudspeaker (LTw) is configured in the left side of left mediant trumpet (LSc), and right loudspeaker (RTw) is configured in the right side of right mediant trumpet (LSc), and back (rear) loudspeaker (BTw) is configured in the right side of back (rear) mediant trumpet (BSc).

In the present embodiment, above-mentioned loudspeaker is configured in the upper surface of the baffle plate 23a of top loudspeaker enclosure 23, and the overlapping plate 9 day after tomorrow with perforate that is provided with, the ring of the flange of mounting loudspeaker, and boudle then 59 is screwed again.

On the other hand, in the bottom loudspeaker enclosure 22 shown in Fig. 3 (b), the outer panel 22b around it is the inequilateral sexangle, and the curved-surface structure that is prolonging the backplate 28 of basket is provided with.This outer panel 22b compares with the outer panel 23b of top loudspeaker enclosure 23, more extends to low range one side, and makes the side of player's one side stretch out the amount of thickness of slab size to player's one side.

The left and right side of outer panel 22b with about side plate 6 parallel (parallel) with the key length direction, player's one side and the inboard of outer panel 22b are parallel to the key orientation.

In cut apart plate 22c and be parallel to the key length direction, be used for bottom loudspeaker enclosure 22 is divided into three parts on left side, central authorities and right side.In cut apart plate 22d and be parallel to the key orientation, be used for the central authorities and the right side of bottom loudspeaker enclosure 22 are divided into player's one side and inboard two parts.In cut apart plate 22e and be used for two parts that player's one side with bottom loudspeaker enclosure 22 further is divided into central authorities and right side.

In being split into tetrameric loudspeaker enclosure altogether, dispose left bass horn (LWo) as shown in Figure 2, central bass horn (CWo), right bass horn (RWo), back (rear) bass horn (BWo).

If comparison diagram 3 (a) and Fig. 3 (b), then central bass horn (LWo) and central mediant trumpet (CSc) are positioned at position identical when horizontal direction is seen, all are configured in the central authorities of the keyboard 51 in the key orientation.

The position of close slightly high range one side of mediant trumpet (BSc) and player's one side after back bass horn (LWo) is configured in relatively.

So, loudspeaker enclosure is divided into top loudspeaker enclosure 23 and bottom loudspeaker enclosure 22.Therefore, the sound wave (acoustic wave) of the antiphase of sending from the back side of the taper oscillating plate of bass horn is not with the sound wave generation phase interference of the positive phase of sending upward from the front openings of the taper oscillating plate of mediant trumpet.Similarly, the sound wave of the antiphase of sending from the back side of the taper oscillating plate of mediant trumpet is not with the sound wave generation phase interference of the positive phase of sending downwards from the front openings of the taper oscillating plate of bass horn.

In addition, in bottom loudspeaker enclosure 22, top loudspeaker enclosure 23, because the loudspeaker enclosure space of left half, middle body, right half and rear section is separate, so in loudspeaker, can not interfere.Because the sampling source of the source of sound of the sound wave that sends from each loudspeaker enclosure is original just approximate mutually, die down if interfere the action effect in the sampling source that will make a plurality of sources of sound.

Each above-mentioned loudspeaker enclosure 22,23 is preferentially made with plank or damping material, and puts into acoustic absorbant in case.

Fig. 4 (a) and Fig. 4 (b) send the block diagram of the function of musical sound for being used for explanation in response to the key pressing operation at Fig. 1 (a) and Fig. 1 (b) illustrated embodiment loudspeaker, converter.

Fig. 4 (a) is all structural drawing, Fig. 4 (b) for the inner structure of the distributor circuit (lattice network) 68 of Fig. 4 (a) with the block diagram shown in the amplifier of its outgoing side, loudspeaker, the converter.

Among the figure, for having marked identical Reference numeral with part that Fig. 1 (a)～Fig. 3 (b) is identical.

In Fig. 4 (a), detect each the white key 31 on the keyboard 51, the operation of black key 32, the operation of pedal 18 by test section 61, this detection signal is output to control part 62.The such performance data that control part 62 will be used to control sound source part 63 outputs to sound source part 63.This such performance data comprises that the opportunity of pushing and discharging (timing) of key, pitch (note number), the key corresponding with the key that is pressed or discharge push speed (velocity), data such as (aftertoutch) amount after touch.In addition, also can export the kind of operated pedal 18, the data of operational ton.

Above-mentioned control part 62 is realized by making CPU actuating equipment embedded program.

Set a plurality of action button 27d on the upper surface of the operating surface board (automatic playing unit) 27 of the drawer type shown in Fig. 1 (a) and Fig. 1 (b), Fig. 3 (a) and Fig. 3 (b) for example comprise: sound source part 63 is set the switch that the setting operation of instrument tambers (kind of various piano sounds, key harp (harpsichord) tone color, pipe organ tone color etc. are arranged) is used; The selected songs for automatic playing, perhaps the control switch that begins to reproduce or stop to reproduce etc.

The operation detected portion 61 of action button 27d detects, and outputs to control part 62, in control part 62, the function of distributing to each action button 27d is set on electric keyboard instrument.Under the situation that sound source part 63 is set, give sound source part 63 output sound source setting data.

In operating surface board (automatic playing unit) 27, be built-in with the music data storage part 65 that is used to store a plurality of music datas.

Automatic playing portion 64 reads out in the melody of storage in the music data storage part 65 by the operation to action button 27d, and the such performance data of midi format is outputed to control part 62, thus the automatic playing music data.

Music data storage part 65 for example is a flash ROM, for example, can take off this flash ROM and be connected with personal computer, just music data can be installed.

Midi interface 66 is used to import from the external device (ED) such performance data of the midi format that provides of personal computer or other electronic musical instruments for example, and outputs to control part 62, generates note signal thus.Though omitted diagram, also can via midi interface 66 music data be installed from personal computer.

Sound source part 63 is according to the such performance data that receives from control part 62, the note signal that generates pitch and intensity based on sound source setting and key pressing operation to tone color etc., and output to D/A converter 67.

Sound source part 63 uses the sampling source of a plurality of (being four in this embodiment) sampling source of sound in order to produce a musical sound,, uses left sampling source, central sampling source, right sampling source, post-sampling source (rear source) that is.The sampling source record of these sampling sources of sound is in not shown sound wave storer.

These sound waves are meant, for example based on the sampled waveform of recording of the note signal that sends when playing the grand piano of nature musical instrument, the waveform that again this waveform has been carried out processing as required.

That is, on the string of grand piano, about 10cm on string for example determines a left side, central authorities, right, this 4 point of back, and microphone is set herein, makes the sampling sound wave based on reality being played the tone waveform that sound sampled.

For other natural musical instruments, promptly for the piano of other kinds, the sound wave of key harp, pipe organ etc. is arranged, also can select appropriate a plurality of points, microphone is set on these a plurality of points, and, make a plurality of sampling sound waves based on reality is played the tone waveform that sound is sampled.

Above-mentioned sound wave also can adopt the musical sound of synthetic to replace the musical sound of sampling and recording.

Sound source part 63 uses sound wave to generate the tone data of the four systems of L, C, R, B, and is input to D/A converter 67 based on received such performance data.

D/A converter 67 outputs to distributor circuit 68 with sample simulation note signal 67L, 67C, 67R, the 67B of source (L Source), central sampling source (C Source), right sampling source (R Source), post-sampling source (B Source) of a left side.Distributor circuit 68 will be simulated note signal and will be assigned to a plurality of loudspeakers of introducing the front, a plurality of converter.

The simulation note signal of distributor circuit 68 outputs is exaggerated device 69 ₁～69 ₁₆Be supplied to a plurality of loudspeakers, a plurality of converter after the power amplification.In this block diagram, though omitted diagram, the volume balance that can on distributor circuit 68, be provided for controlling overall loudness, each loudspeaker especially before and the balance adjustment of back loudspeaker, the open and close of each converter especially encourage the control circuit of shake pattern and non-selection of encouraging the pattern of shaking etc.

In the present embodiment, frame plate uses converter 55,56 the same with each loudspeaker with converter 24,25, castanets, is to drive at the note signal that sound source part 63 generates by the performance based on keyboard 51.That is, not specially to generate the converter drive signal, but the same with the primary sound piano, note signal and drive signal are same signals.

With reference to Fig. 4 (b), distributor circuit 68 is illustrated.

Simulation note signal 67L, the simulation note signal 67C in central sampling source, the simulation note signal 67R in right sampling source, the simulation note signal 67B in post-sampling source in the sampling source, a left side of D/A converter 67 output, distribution wave filter of using via loudspeaker and amplifier and become the loudspeaker that is supplied to left Lindenmayer system respectively

The electroacoustic signal of the loudspeaker (RWo, RSc, RTw) of the loudspeaker (CWo, CSc, CTw) of (LWo, LSc, LTw), central C system, right R system, the loudspeaker (BWo, BSc, BTw) of back B system.

The distribution wave filter that above-mentioned loudspeaker is used and the structure of amplifier, because of all identical in above-mentioned arbitrary system, so following Lindenmayer system is illustrated.The distribution wave filter that loudspeaker is used is by LPF (low-pass filter) 70 ₁, BPF (bandpass filter) 70 ₂, HPF (Hi-pass filter) 70 ₃Constitute.

The simulation note signal 67L in sampling source, a left side is via LPF70 ₁, amplifier 69 ₁Be provided for left bass horn (LWo), via BPF70 ₂, amplifier 69 ₂Be provided for left mediant trumpet (LSc), via HPF70 ₃, amplifier 69 ₃Be provided for left loudspeaker (LTw).

In addition, the simulation note signal 67C in the simulation note signal 67L in the sampling source, a left side of D/A converter 67 output and central sampling source in mixer circuit (MIX) 71 by audio mixing (Mixing).Audio signal becomes the electrical vibration signal of the converter that is used to drive left Lindenmayer system with distributing wave filter and amplifier via converter.

In above-mentioned mixer circuit (MIX) 71, the simulation note signal 67L in the source of for example being sampled in a left side is with 127 ratio, carry out audio mixing with the sample simulation note signal 67C in source of central authorities with 80 ratio.Like this, even be used to drive the signal of the converter of left Lindenmayer system,, can produce the vibration of nature though the simulation note signal 67L in the source of also being sampled in a left side as core, carries out audio mixing by the simulation note signal 67C with central authorities sampling sources.

At this, to satisfy under the situation of above-mentioned ratio, how much the gain of mixer circuit 71 (two inputs being made as the output of 1 o'clock audio signal respectively) is arbitrarily if being designed to.

For example, sampled in a left side simulation note signal 67L in source multiply by 127/ (127+80) number, central authorities' value that the simulation note signal 67C in source multiply by 80/ (127+80) of sampling is carried out addition.Perhaps, take advantage of on the basis of 127/80 value the simulation note signal 67C addition in the source of directly central authorities being sampled at the simulation note signal 67L in left side sampling source.

As the latter,, then can be that the deterioration of the converter efficiency of benchmark compensates in mixer circuit (MIX) 71 to efficient with loudspeaker if the gain of mixer circuit has surpassed 1.Moreover, adjust amplifier 69 ₄, 69 ₅, 69 ₆Gain also can realize same compensation.

Above-mentioned converter is with distributing wave filter by LPF70 ₄, HPF70 ₆Constitute.

Above-mentioned audio signal is via LPF70 ₄, amplifier 69 ₄Perhaps amplifier 69 ₅Be supplied to frame plate with converter (LKB1) 25, frame plate converter (LKB2) 24, via HPF70 ₆, amplifier 69 ₆Be supplied to castanets left-hand rotation parallel operation (LTr) 55.

Moreover, LPF70 ₄The LPF70 that illustrated earlier ₁Even, the low-pass filter that both are identical, but, make their characteristic difference according to frame plate the not equal of converter (LKB2) 24,25 and left bass horn.Equally, according to castanets the not equal of left-hand rotation parallel operation (LTr) 55 and left loudspeaker, make HPF70 ₆And HPF70 ₃The characteristic difference.

On the other hand, the simulation note signal 67C in the simulation note signal 67R in the sampling source, the right side of D/A converter 67 output and central sampling source in mixer circuit (MIX) 72 by audio mixing, then via HPF70 ₁₀, amplifier 69 ₁₀And becoming the electrical vibration signal of the converter that is used to drive the R system, the converter of above-mentioned R system is castanets in illustrated embodiment with right-hand rotation parallel operation (RTr).

In the above-mentioned mixer circuit (MIX) 72, the simulation note signal 67R in the source of for example being sampled in the right side is with 127 ratio, carry out audio mixing with the sample simulation note signal 67C in source of central authorities with 80 ratio.Like this, even be used to drive the signal of the converter of right R system,, can produce the vibration of nature though the simulation note signal 67R in the source of also being sampled in the right side as core, carries out audio mixing by the simulation note signal 67C with central authorities sampling sources.

At this, satisfying under the situation of above-mentioned ratio, how many gains of mixer circuit 72 is designed to, this is same with the mixer circuit 71 that illustrated earlier, all is arbitrarily.For example sampled the simulation note signal 67R in source in the right side with 127/ (127/80) multiple, the sample simulation note signal 67C in source of central authorities is carried out addition with 80/ (127/80) multiple.Perhaps, become on 127/80 times the note signal simulation note signal 67C addition in the source of directly central authorities being sampled at the simulation note signal 67R that makes right sampling source.

Moreover, according to castanets the not equal of right-hand rotation parallel operation (RTr) 56 and right loudspeaker (RTw), make HPF70 ₁₀And HPF70 ₁₃The characteristic difference.

For encouraging the device of the usefulness of shaking, for example self-resonant frequency is about 80[Hz to frame plate with converter (LKB1) 25 with converter (LKB2) 24, frame plate], characteristic peak is arranged herein.To as about 30[Hz of lowest resonance frequency] till gently smoothly decline.On the other hand, sentence about 20[dB/oct in the frequency higher than self-resonant frequency] decay.

On the other hand, the castanets about also are the devices of encouraging the usefulness of shaking with converter (LTr, RTr) 55,56.Yet their shape is littler with converter 24,25 than frame plate, so carry out high-frequency vibration.

The object lesson of bass horn, mediant trumpet and the loudspeaker of above-mentioned each system is shown below.Bass horn is that bore is the cone loudspeaker of 16cm.Mediant trumpet is that bore is the cone loudspeaker of 13cm.Loudspeaker is that bore is balance ball top (Balance Dome) type loudspeaker of 2.5cm.

Utilize above-mentioned distributor circuit 68, player's one side at basket, make the particularly low range side and pedal 18 vibrations of keyboard 51 by frame plate with converter 24,25, and plate 8 became castanets the day before yesterday, made plate 8 the side-to-side vibrations day before yesterday with converter 55,56 by castanets.

In addition, at the rear portion of basket, in each zone of basket, send and the approximate sound wave of each regional sound wave as the grand piano in the sampling source of sampling source of sound.And from the day after tomorrow plate 2 send the sound wave of bass downwards, from the day after tomorrow plate 9 send the sound wave of middle pitch and high pitch upward.

At the sound wave that plate 9 will send upward from the day after tomorrow, by opening and closing protecgulum 10, cover 11 greatly, the sender that can control sound wave to the amount of sending.

Therefore, can with natural musical instrument as the sampling source of source of sound be the identical vibration transfer of grand piano on player's finger and pin, and around basket, send the sound wave identical with grand piano.

Claims (2)

1. electric keyboard instrument has:

Frame plate is used to set keyboard, and a plurality of keys of described keyboard are operated by the fulcrum of described each key;

Pedal is operated by the player;

The pedal pillar is used to support described pedal;

Sound source part is exported note signal in response to the pressing operation of described each key, and controls described note signal by the operation of described pedal;

A plurality of frame plate converters vibrate based on the note signal from described sound source part output;

It is characterized in that:

Described fulcrum is made of the key support component;

Described key support component is arranged on the upper surface of described frame plate along the key orientation;

Described a plurality of frame plate is with the ad-hoc location on one in the converter lower surface that is arranged on described frame plate, this ad-hoc location is meant, being the corresponding region of key support component, is again the position at the center section between central and described keyboard basso one end at described keyboard in the described key orientation;

Described a plurality of frame plate is arranged on the ad-hoc location on the lower surface of described frame plate with in the converter another, this ad-hoc location is meant, being the corresponding region of key support component, is again the position of the center section between the central authorities of described set position in frame plate usefulness converter and described keyboard in the described key orientation;

Described pedal pillar is arranged at the central authorities of the described keyboard in the described key orientation in lower surface one side of described frame plate.

2. electric keyboard instrument according to claim 1 is characterized in that,

Have the automatic playing unit,

Described automatic playing unit is the コ font when depression angle is seen, and is provided in lower surface one side of described frame plate,

It is in the described recess of コ font that frame plate is arranged on when depression angle is seen with described one at least a portion in the converter.

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